南黄海北部B03孔黏土矿物和稀土元素地球化学特征及物源分析
发布时间：2018-07-16 23:59
【摘要】：本文通过对南黄海北部B03孔沉积物黏土矿物组成、黏土粒级沉积物元素地球化学分析以及沉积速率研究,探讨其物质来源及其环境变化记录。研究认为,B03孔沉积物中黏土矿物组分以伊利石为主,同时含有较多蒙脱石,伊利石-蒙脱石-(高岭石+绿泥石)判别图解表明该岩芯源区主要来自黄河沉积物;B03孔黏土粒级沉积物稀土元素分布模式显示,90cm以上的黏土粒级沉积物稀土元素球粒陨石标准化分布模式与黄河沉积物的较为接近,表明其与黄河沉积物的亲缘性较大。结合B03孔的210Pb测年结果和稀土元素地球化学特征,推测1855年黄河改道对山东半岛东部陆架海的物源影响是造成该岩芯以90cm为界分为上下两段沉积的主要原因。
[Abstract]:In this paper, the mineral composition of clay, element geochemistry of clay grain-grade sediments and deposition rate of B03 pore sediments in the northern part of South Huang Hai are studied, and the source of material and the records of environmental changes are discussed. It is considered that the clay minerals in the sediments of pore B03 are mainly composed of Illite and contain more montmorillonite. Illite-montmorillonite-(kaolinite chlorite) discriminant diagram shows that the core source area is mainly from the Yellow River sediment B03 pore clay grain sediment REE distribution pattern shows that more than 90 cm of clay grain sediment REE The standardized distribution model of chondrites is close to that of the Yellow River sediments. It shows that it is related to the Yellow River sediment. Based on the 210Pb dating results of B03 well and the geochemical characteristics of rare earth elements, it is inferred that the influence of the Yellow River diversion on the continental shelf sea in the eastern Shandong Peninsula in 1855 is the main reason for the core to be divided into upper and lower sections with 90cm as the boundary.
【作者单位】： 中国海洋大学海底科学与探测技术教育部重点实验室;中国海洋大学海洋地球科学学院;
【基金】：国家自然科学基金项目(41376053)资助~~
【分类号】：P736
[Abstract]:In this paper, the mineral composition of clay, element geochemistry of clay grain-grade sediments and deposition rate of B03 pore sediments in the northern part of South Huang Hai are studied, and the source of material and the records of environmental changes are discussed. It is considered that the clay minerals in the sediments of pore B03 are mainly composed of Illite and contain more montmorillonite. Illite-montmorillonite-(kaolinite chlorite) discriminant diagram shows that the core source area is mainly from the Yellow River sediment B03 pore clay grain sediment REE distribution pattern shows that more than 90 cm of clay grain sediment REE The standardized distribution model of chondrites is close to that of the Yellow River sediments. It shows that it is related to the Yellow River sediment. Based on the 210Pb dating results of B03 well and the geochemical characteristics of rare earth elements, it is inferred that the influence of the Yellow River diversion on the continental shelf sea in the eastern Shandong Peninsula in 1855 is the main reason for the core to be divided into upper and lower sections with 90cm as the boundary.
【作者单位】： 中国海洋大学海底科学与探测技术教育部重点实验室;中国海洋大学海洋地球科学学院;
【基金】：国家自然科学基金项目(41376053)资助~~
【分类号】：P736
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